Negative electrode for alkaline secondary batteries.



Ammo

H I'NRIGIEI. TEMKUL 1% Drawing ll wlim'liou lllinl Jonu Specification of I "-llll Ell i li YXIHF-ARY MATTHHF'EES.

mil Mimi. 'lolonlioliMayi322;1M4.

inn. Srriol no. worm.

To all iii/10m it may com/urn Bo i lmoimlhnl wo, Ilillfilh'lilljfi Paw, Ruuow Luowxo lonsom: and Jim AooLrri il lnwm Aonummoii, subjm: 2 Emperor of {Biol-many, residing at l'lmulrurg in Germany, have invonted now and useful lmprovemenis 'Allmlino iloconelury llui'lorios olf union the following is o upocilioulion.

Gui invention. relulos lo ollmlino srronlflor batteries, urrcl more parli-irnlurly lo the pmlluotion o'lf nogotiro oleclroilou for Burl). baitlm'i es.

ll'oreloloro, for tho jury-live: olrclrudes of uilziulino -o-n(ilnr bnlloriou, such as nickelrron bnltorles, the only prrmlnivnl umlerml been iron or tfllllllldm, oalloys of iron null cadmium. ll llllulilllkf-j are, however, encountered in tin), production of 1115;,{1llii'0 rlrolrodos, which will show 1r slowly i-upur'lly combiinnl and uucomlnoml motol. The coon binerl niolol lltLilurg'oly pusscil nto :1 (01th.

pound. {255:

i L) Ll lsuitably combined Willa u rl'lntlnuliivosill pork. i

8n oloolrolysisa, giro llli'lflfi'll hl ion is platool out, but immediately lie-composing,

only a thin, lilrn o'l' lho ino'lol is 'fm'rned, am; mourn, gas escaping. 'llio inocul '(lius for-mod gii'oil n, coherent muting over lalm purtiulou of umonilcrinoajl inolnl. meniiug tlio onlire nmsz-l ini'zolmnimlly, no HULL ll] is no hunger suliflool; lo lilo disinm Nu mlive il lluotroclos for on, finely nou'ilorul .el erl'xrmlo', w in? re by the f'llliin i'i-milts in cm logrutiou limb in a prominent defect in liuolv ilirirflotl noun-nu null/oral. 'llle mnmon'rx 515112: is given oli' lilllllilll? surface: of the cloclvroiio and, in escaping to the exterior, muses; innumerable ininuio passages to be formed liming; 1-, (apology, porous 102155 that. is firmly scoured iogollurr, Thus u, strong olrclrode Wllll u zmimimum ourlm-o is obtained.

In orrlo: irmuro ll-lllll" tho aunnonia will more rmulily act on i110 nurlnl we may :unnlgnnullo tho unuol will] nwroury. orllrr lo ennui: this nunrlgunmlion to lufOllIlUll, ii; umy also lio noun-usury lo first copper lilo niolial. 'lfhoso processes are well ll no w n.

Haring; llius (inscribed our invention, wlnii. we ulnim is:

3,. 'llio promo; of forming iuotnllio negalivooloulroden for socondury batteries, which consists; in elm-Molly",ing u nielnl-ununonium oonuqtflinud and llqlosiling the metal liliur- Mod on ii firmly divided slums of metal, the

gas lilwriuoi'l passing lln'ough llu': umss in cramping :uul riuniuriug it porous.

ll 'llio pron of forming nogutive eleclll'lNlO luuluruil, iyluoli UOIhilrilS in convoriing a portion. of lino'ly (liviilml metal for tho olw-trolio'into :1 compound, and than electrolymng lilQSfinlG, whereby metal and gas are lilmrnloil, llzo niolial thus formed oombinmg the finely divided ir'wtol and the, escaping gas rendering the metal nnms'porous.

El. 'llw process of forming negative eleclrljnli'u for alkaline Secondary batteries, Whiz-l1 oons'sls in partially converting the lllPllll for tho rlocirotlointd an ununoniuln rl'nupounll, and subsoquontly oleclrolyzing the latter Wllll finely ing (lown', gives a metallic film uniting tlu' [)llllll'llffi of mololsinto n olid Inns; and munumiu gun which renders tho unues porous in esouphuf. l,

4. The pronoun of forming negative eleclrmlr; for alkaline lsovonclzugy bzlfl'erios, wliioli cousiol's in hunting: finely (lividod molal Willi. uumumin alor, whereby a portion rrl" tho mntal is oouverlml into am amuniniu-u': rmnpminll; 'omnprossing the re.-

with the remaining; unconverted portion of.

divided metul as an,

oompouml, in brook- ,90

mainirigmetal and the compound, and "chem I set our hands in presenc of two subscribing electmlyzing the same, whereby the 601m Witnesses. I pound isvbroken 1 freed metal HEINRICH PAUL'RUDOLF LUDWIG'PURSCKE. bining with the remaining uncom'erted JULIUS ADOLPH ERWIN-ACHENBACH. metal andihc ammonia gas liberated re'n- Wifness'es: .dgrilng the metal mass porous. ERN ST H. L,MUMMENH0FF, lmtestimonj whereof .wehave hereunto IDA Cnms'r. IIAFERMANN. 

